Wavelength-selective path-switching element

摘要

A wavelength-selective path-switching element has a silicon substrate on which a pattern of optical waveguides including a first optical waveguide, a second optical waveguide and an intermediary optical waveguide is formed. The widths W1, W2, and W3 of these optical waveguides, lengths L1, L2, and spacing G1, G2 are so set that light of a first wavelength entered into the first optical waveguide propagates on the first, intermediary, and second optical waveguides, exits from the second waveguide, propagates on an output waveguide, and is outputted and that light of a second wavelength entered into the first waveguide after propagating on an input waveguide is outputted from this first waveguide. The wavelength-selective path-switching element can be easily fabricated at low cost and have no light leaking out.

主权项

1. A wavelength-selective path-switching element comprising:
a first optical waveguide; an intermediary optical waveguide; and a second optical waveguide arranged on opposite sides of said intermediary optical waveguide from said first optical waveguide, wherein said first optical waveguide and said intermediary optical waveguide are arranged substantially close to each other; wherein said intermediary optical waveguide and said second optical waveguide are arranged substantially close to each other; wherein said first optical waveguide is arranged to receive light of a first wavelength and to convey the light of the first wavelength to said intermediary optical waveguide; wherein said second optical waveguide is arranged to receive light of the first optical wavelength from said intermediary optical waveguide and to output the light of the first optical waveguide from said second optical waveguide; and wherein said first optical waveguide is further arranged to receive light of a second wavelength and to output the light of the second wavelength from said first optical waveguide.